Business Segments Business Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Revenue	$ 4,131,393	$ 3,745,887	$ 3,046,145
Operating income (loss):	637,451	518,296	319,261
Interest Expense	2,250	2,156	9,684
Other Income	(6)	(2,046)	(466)
Loss on early extinguishment of debt	0	9,072	0
Income before income taxes	635,207	509,114	310,043
Depreciation and amortization:	17,174	16,915	17,578
Northern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	1,714,236	1,595,746	1,256,405
Operating income (loss):	217,499	211,958	125,588
Interest Expense		76	2,465
Interest Income, net of Interest Expense	(469)
Depreciation and amortization:	3,308	3,407	3,342
Southern Homebuilding [Member]
Segment Reporting Information [Line Items]
Revenue	2,330,962	2,048,113	1,702,727
Operating income (loss):	451,874	312,661	202,561
Interest Expense			4,292
Interest Income, net of Interest Expense	(1,447)	(464)
Depreciation and amortization:	2,790	3,644	4,468
Financial Services Sector [Member]
Segment Reporting Information [Line Items]
Revenue	86,195	102,028	87,013
Operating income (loss):	44,382	62,291	53,395
Interest Expense	5,122	3,912	2,927
Depreciation and amortization:	2,178	2,227	3,034
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Less: Corporate selling, general and administrative expenses	(76,304)	(68,614)	(62,283)
Interest and Other Income	(956)	(1,368)	0
Depreciation and amortization:	$ 8,898	$ 7,637	$ 6,734